From patchwork Wed Jun 19 15:00:56 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Arthur Chunqi Li X-Patchwork-Id: 2749941 Return-Path: X-Original-To: patchwork-kvm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork1.web.kernel.org (Postfix) with ESMTP id DD5819F39E for ; Wed, 19 Jun 2013 15:01:27 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 0EBF82016A for ; Wed, 19 Jun 2013 15:01:23 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 39F7E2015B for ; Wed, 19 Jun 2013 15:01:18 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756892Ab3FSPBO (ORCPT ); Wed, 19 Jun 2013 11:01:14 -0400 Received: from mail-pb0-f49.google.com ([209.85.160.49]:59330 "EHLO mail-pb0-f49.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756767Ab3FSPBO (ORCPT ); Wed, 19 Jun 2013 11:01:14 -0400 Received: by mail-pb0-f49.google.com with SMTP id jt11so5175298pbb.36 for ; Wed, 19 Jun 2013 08:01:13 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=from:to:cc:subject:date:message-id:x-mailer; bh=haeZyftRZbXQd9RyBEf6mYtUa9OHvF/huOrv1IftGr8=; b=Mp2sRfVcVXpzpAQi0NBVInYBisvuWGtkyD1HPu42ZZhOmXnjQicb8yEF41ASNY0yhR o3KXP7PvQSccKp0rHbcNFO7VovDI3a4gO50SNS2TSTPuFLXS8Z5CpJZmyb8Y0c8xrP74 oi5CsD83yH9W4/+5fD9j6CuEzCHSQfV1/idPQbSRsU/gUNc94tdpTo+OrZoOWKrNdOiD CLT9j3rqLpyXmmllLALqCI+99ZCwnh5+APJueBjiVaT+fx1Vt+R5JMxQGfOTMjzQF3in 15SxZs6cNAFBbBaYikFQ8x0xJY8fJqKAIus/YHtQbwHF3J8tX4cSmBzpy1uGeG99t3Mb LKeA== X-Received: by 10.68.169.97 with SMTP id ad1mr1836349pbc.84.1371654073753; Wed, 19 Jun 2013 08:01:13 -0700 (PDT) Received: from Blade1-02.Blade1-02 ([162.105.146.101]) by mx.google.com with ESMTPSA id pb5sm23452882pbc.29.2013.06.19.08.01.09 for (version=TLSv1.1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Wed, 19 Jun 2013 08:01:11 -0700 (PDT) From: Arthur Chunqi Li To: kvm@vger.kernel.org Cc: gleb@redhat.com, pbonzini@redhat.com, jan.kiszka@web.de, Arthur Chunqi Li Subject: [PATCH 1/2] kvm-unit-tests: Add a func to run instruction in emulator Date: Wed, 19 Jun 2013 23:00:56 +0800 Message-Id: <1371654057-17169-1-git-send-email-yzt356@gmail.com> X-Mailer: git-send-email 1.7.9.5 Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org X-Spam-Status: No, score=-8.1 required=5.0 tests=BAYES_00, DKIM_ADSP_CUSTOM_MED, DKIM_SIGNED, FREEMAIL_FROM, RCVD_IN_DNSWL_HI, RP_MATCHES_RCVD, T_DKIM_INVALID, UNPARSEABLE_RELAY autolearn=ham version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Add a function trap_emulator to run an instruction in emulator. Set inregs first (%rax is invalid because it is used as return address), put instruction codec in alt_insn and call func with alt_insn_length. Get results in outregs. Signed-off-by: Arthur Chunqi Li --- x86/emulator.c | 110 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 110 insertions(+) mode change 100644 => 100755 x86/emulator.c diff --git a/x86/emulator.c b/x86/emulator.c old mode 100644 new mode 100755 index 96576e5..48d45c8 --- a/x86/emulator.c +++ b/x86/emulator.c @@ -11,6 +11,15 @@ int fails, tests; static int exceptions; +struct regs { + u64 rax, rbx, rcx, rdx; + u64 rsi, rdi, rsp, rbp; + u64 r8, r9, r10, r11; + u64 r12, r13, r14, r15; + u64 rip, rflags; +}; +struct regs inregs, outregs, save; + void report(const char *name, int result) { ++tests; @@ -685,6 +694,107 @@ static void test_shld_shrd(u32 *mem) report("shrd (cl)", *mem == ((0x12345678 >> 3) | (5u << 29))); } +#define INSN_SAVE \ + "ret\n\t" \ + "pushf\n\t" \ + "push 136+save \n\t" \ + "popf \n\t" \ + "xchg %rax, 0+save \n\t" \ + "xchg %rbx, 8+save \n\t" \ + "xchg %rcx, 16+save \n\t" \ + "xchg %rdx, 24+save \n\t" \ + "xchg %rsi, 32+save \n\t" \ + "xchg %rdi, 40+save \n\t" \ + "xchg %rsp, 48+save \n\t" \ + "xchg %rbp, 56+save \n\t" \ + "xchg %r8, 64+save \n\t" \ + "xchg %r9, 72+save \n\t" \ + "xchg %r10, 80+save \n\t" \ + "xchg %r11, 88+save \n\t" \ + "xchg %r12, 96+save \n\t" \ + "xchg %r13, 104+save \n\t" \ + "xchg %r14, 112+save \n\t" \ + "xchg %r15, 120+save \n\t" \ + +#define INSN_RESTORE \ + "xchg %rax, 0+save \n\t" \ + "xchg %rbx, 8+save \n\t" \ + "xchg %rcx, 16+save \n\t" \ + "xchg %rdx, 24+save \n\t" \ + "xchg %rsi, 32+save \n\t" \ + "xchg %rdi, 40+save \n\t" \ + "xchg %rsp, 48+save \n\t" \ + "xchg %rbp, 56+save \n\t" \ + "xchg %r8, 64+save \n\t" \ + "xchg %r9, 72+save \n\t" \ + "xchg %r10, 80+save \n\t" \ + "xchg %r11, 88+save \n\t" \ + "xchg %r12, 96+save \n\t" \ + "xchg %r13, 104+save \n\t" \ + "xchg %r14, 112+save \n\t" \ + "xchg %r15, 120+save \n\t" \ + "pushf \n\t" \ + "pop 136+save \n\t" \ + "popf \n\t" \ + "ret \n\t" \ + +#define INSN_TRAP \ + "in (%dx),%al\n\t" \ + ". = . + 31\n\t" \ + +asm( + ".align 4096\n\t" + "insn_page:\n\t" + INSN_SAVE + "test_insn:\n\t" + INSN_TRAP + "test_insn_end:\n\t" + INSN_RESTORE + "insn_page_end:\n\t" + ".align 4096\n\t" + + "alt_insn_page:\n\t" + INSN_SAVE + "alt_test_insn:\n\t" + INSN_TRAP + "alt_test_insn_end:\n\t" + INSN_RESTORE + "alt_insn_page_end:\n\t" + ".align 4096\n\t" +); + +static void trap_emulator(uint64_t *mem, uint8_t* alt_insn, int alt_insn_length) +{ + ulong *cr3 = (ulong *)read_cr3(); + void *insn_ram; + int i; + extern u8 insn_page[], test_insn[], test_insn_end[]; + extern u8 alt_insn_page[], alt_test_insn[]; + + insn_ram = vmap(virt_to_phys(insn_page), 4096); + for (i=1; i